package com.yeyaomai.dksns.flowis.service;

import java.util.List;
import com.yeyaomai.dksns.flowis.domain.UserReturnRate;

/**
 * 用户回头率
 * 
 */
public interface UserReturnRateService {
	void add(UserReturnRate userReturnRate);

	UserReturnRate getById(long id);

	List<UserReturnRate> getByDate(String start,
			String end);
}
